Asteraceae vs genus Grindelia

Asteraceae and genus Grindelia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Asteraceae	Yes	No	No	No
genus Grindelia	Yes	No	No	No

Asteraceae (noun)	genus Grindelia (noun)
plants with heads composed of many florets: aster, daisy, dandelion, goldenrod, marigold, lettuces, ragweed, sunflower, thistle, zinnia	large genus of coarse gummy herbs of western North and Central America